[Bible Answer to fan of Joseph Prince] Greetings in Jesus’ name. The ultimate issue with teachers is truth. 
As a Christian, I am commanded to expose the unfruitful deeds of darkness (Eph. 5:11), contend against the grace changers (Jude 3,4), preach the word to correct and rebuke (2 Tim. 4:2-4), etc. To show, by documenting someone’s teachings, then contrasting such to Scripture, is a blessing and help. It is like a road sign showing a traveler which way to go. It is not being unloving or unmerciful. It is obedience to God and showing love for precious SOULS, who are being lethally deceived. It has nothing to do with being disrespectful. (A false teacher shouldn’t be shown the respect and honor a true teacher should get anyways.)
Please know, just because someone mentions the Lord Jesus, grace, salvation, eternal life, Christian, etc. doesn’t mean he/she is declaring Biblical truth, even if he is popular and a smooth talker. If you would take some time and read through the New Testament for yourself you will notice the emphasis is on truth as stated in Scripture (2 Tim. 3:16,17), especially when dealing with the gospel. Just for preaching a false gospel, one will go to hell (Gal. 1:8,9). That alone shows how vital truth is, especially about salvation itself.
Any person who claims to declare the truth of God about salvation, being a Christian or the related, but isn’t, is really a dangerous snare and stumbling block to precious SOULS regardless how friendly, smiley and sound he may appear. 
It’s like driving down a dangerous road going in the wrong direction because of someone misleading you. Many spiritual things are NOT like Joseph Prince teaches! He has misrepresented grace, distorted the image of being a Christian, contorted what God is like, etc.! He has people believing they are on the road to heaven guaranteed to enter God’s kingdom after death, when they are actually on the road to hell in dire need of repentance for salvation’s sake. How serious is that? What kind of respect should such a dangerous person be shown? Souls have been adversely affected by his teachings. Unfortunately, Joseph Prince is not alone. There are many others in our day, who have rushed for profit into Balaam’s error (Jude 11), changed grace into a license to sin (Jude 3,4), etc. The 30,000 in his congregation is very small compared to the number in Catholicism. Joseph Prince would have to say that Catholicism is blatantly wrong about their Mary, the pope being infallible, etc. yet the Catholic Church has about 1,000,000,000 under their deceptive influence! Numbers are irrelevant. Truth is the issue and Joseph Princes (and others like him) fail miserably there.
To be sincere and/or believe in God is not good enough! To mention Biblical terms is not good enough. If we are deceived about salvation by a false prophet, which are day is full of (Mt. 7:15; Mt. 24:11, 24; 2 Pet. 2:1-3; 1 John 4:1), it won’t turn out good. To be a Christian one must first learn what it takes and do it. Just knowing the true plan of salvation is worthless unless one acts upon truth and that has been confused, denied and avoided by false teachers. Sin drags people to hell fire (Mk. 9:43-48 cf. 1 Cor. 6:9,10). Anyone who teaches God can’t see sin after one gets saved, his future sins are already forgiven or the like, is more dangerous than a quack medical doctor. The harm he is inflicting will stretch throughout eternity and that includes Joseph Prince.
We have much free material proving from the Scriptures that our doctrines are Biblically sound. We also have books, which have helped many better understand these salvation related issues. To refute false teachers and concepts is an example set by the Lord Jesus himself (Mt. 23:1-33; John 8:39-59) and the Apostle Paul (Acts 17:29-32; etc.). Have I become your enemy by telling you the truth (Gal. 4:16)?
